Mitarbeitsnote-Aggregation (3.2)

Neuer Dialog berechnet aus den Sitzungs-Bewertungen je Schüler eine
Mitarbeitsnote (H1/H2/Gesamtjahr), mit editierbarer Aspekt-Gewichtung,
Trendanzeige und Übernahme als Grade (Category=Participation).

LehrerApp.Desktop/Views/Groups/ParticipationTabView.axaml.cs

@@ -1,7 +1,10 @@
 using Avalonia.Controls;
 using Avalonia.Controls.Templates;
 using Avalonia.Data;
+using LehrerApp.Core.Interfaces;
+using LehrerApp.Core.Services;
 using LehrerApp.Desktop.ViewModels.Groups;
+using Microsoft.Extensions.DependencyInjection;
 
 namespace LehrerApp.Desktop.Views.Groups;
 
@@ -20,6 +23,7 @@ public partial class ParticipationTabView : UserControl
             _vm = vm;
             vm.OnAddSession = ShowAddSessionDialog;
             vm.OnQuickInput = ShowQuickInputDialog;
+            vm.OnComputeGrade = ShowComputeGradeDialog;
             vm.Aspects.CollectionChanged += (_, _) => BuildColumns();
             vm.PropertyChanged += (_, pe) =>
             {
@@ -141,4 +145,22 @@ public partial class ParticipationTabView : UserControl
         if (owner is not null)
             await dialog.ShowDialog(owner);
     }
+
+    private async Task ShowComputeGradeDialog(ParticipationTabViewModel tabVm)
+    {
+        var dialogVm = new ParticipationGradeDialogViewModel(
+            App.Services.GetRequiredService<IParticipationSessionRepository>(),
+            App.Services.GetRequiredService<IParticipationRepository>(),
+            App.Services.GetRequiredService<IParticipationAspectRepository>(),
+            App.Services.GetRequiredService<IStudentRepository>(),
+            App.Services.GetRequiredService<IEnrollmentRepository>(),
+            App.Services.GetRequiredService<IGradeRepository>(),
+            App.Services.GetRequiredService<GradingService>(),
+            tabVm.GroupId, tabVm.SchoolYear, tabVm.GradingSystem);
+
+        var dialog = new ParticipationGradeDialog { DataContext = dialogVm };
+        var owner = TopLevel.GetTopLevel(this) as Window;
+        if (owner is not null)
+            await dialog.ShowDialog(owner);
+    }
 }